/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Gets the variable linked to a RepNotify function, returns nullptr if not found
static [FBPVariableDescription](API\Runtime\Engine\Engine\FBPVariableDescription) * GetVariableFromOnRepFunction ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, [FName](API\Runtime\Core\UObject\FName) FuncName )